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<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title>
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h1 {font-size:40px;}/*指定文本的字体大小*/
h2 {font-size:30px;}
p {font-size:14px;}
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<h1>This is heading 1</h1>
<h2>This is heading 2</h2>
<p>This is a paragraph.</p>
<p>允许在 Internet Explorer 9, Firefox, Chrome, Opera, 和 Safari 中通过缩放浏览器调整文本大小。</p>
<p><b>注意:</b>这个例子在 IE9之前的版本不工作, prior version 9.</p>

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